Adjusting means for lever arms



Aug. 2, 1932. c. HUCK ADJUSTING MEANS FOR LEVER ARMS Filed Nov. 19, 1928 BK INVENTOR. $4M

II III 4O bodying the invention to move the lever-3 angularly with respect Patented Aug. 2, 1932 v f,

martian 'rT s PATENT C LOUIS c. I-IUCK, or DETROIT, MICHIGAN nnausrrne MEANS son LEVER ARMS Application filed November 19, 1928. Serial No. 820,505.

The present invention relates to means for to, "is arranged to be rotated by a pull on the connecting lever arms to rotatable shafts and rod 2'which is attached to the lever 3 by means to adjustments therefor whereby the angular of a clevis 4 and a clevis pin 5. In the conpositions of said arms on said shafts may be struction shown, a sheave 6 is keyed or i accurately and easily made. 1 splined to the shaft 1 and provided. with shoul- Among the objects of the invention is a ders 7 forming ahub upon which is mounted novel and improved connection of this charthe lever 3 in such way as to be rotatable on acter which is capable of being adjusted with the sheave. In the present construction the facility even though the degree of adjustlever 3 is shown as formed of sheet metal in it ment required may be relatively slight and two parts secured together by rivets 8a, which when so adjusted it will positively hold or parts enclose the sheave 6 and the cooperating lock the shaft and arm in fixed angular relamembers to be describedand may be arranged tion. to offer frictional resistance against'relative Another ob ect is a mechanical connectlon movement of the lever and sheave. of this character which is capable of adjust- The lever 3 is provided at one side with a ment without requiring relative separation tubular extension 3?) open to the space within of parts and which is compact and inexpenthe lever and into this extension projects the sive to manufacture and assemble. end of a threaded stud 8' which at its inner Still other objects will readily occur to end is attached to avshort pieceof cable'lO 20 those skilled in the art by reference to the arranged to pass around the sheave in the following description and the accompanying groove thereof and have its other end fixed drawing in which to the sheave. The method of securing the Fig. 1 is a vertical section on line 11 of end of the cable to the sheave is shown in Fig.

Fig. 2. 5. In this figure the sheave is shown as re- 25 Fig. 2 is a section on line 22 of Fig. 1 cessed as at 11 and the cable 10 is provided Fig. 3 is a section showing the conne wn with a sleeve 9 fixed thereto by, brazing or of the operating link to the lever. any other suitable means, which sleeve drops Fig. 4 is a section on line 41- 1 of F g- 2. into the recesses 11 which prevent longitudililg. 5 is a section on line 5-5 Of Fig. 1. nal movement of the cable,

30 Fig. 6 is a side elevation of a modification The thread d t d 8 t d t th d f showing the adjusting means ing P the tubular extension 36 and intothe nut 14 tively in both directions. which is rotatably mounted therein. It is The present device is suitable for use in r f rr d to plac a mall flanged washer 13 many different mechanisms but as an example on th d f th extension as a b i 35 of one of its applications there has been her for the nut, and to provide the nut 14 chosen vehicle brake mechanism as a specific ith a h ld ti on thi h exam-R16 d pflrtlcularly that PQ of the It will readily be noted that the rotation brake in which, for example, the brake oper- 5x nut 14 in the takemp direction w l v ating cam shaft is rotated by a short lever emexert a pull on the sheave and thereby tend In brake operatin mechanism of the presentday automo ile it is desirable to provide l gg Z E an adjustment which will not chan e the 1S Xed 1n posltlon y t ere Ore t e D sheave 6 must rotate mstead and thereby angular relation of the various levers and th h ft 1 t 1 1 45 rods. Such adjustment is illustrated herein. e S a O new angu ar re a 10H with respect to the lever.

Such a function among others is desirable In order to preserve the ad ustment acin order to compensate for the wear of the v brake bands or lining. complished through rotation of nut 14 1t Referring to the drawing in Fig. 1, a shaft is preferred to secure to the sides of the lever 50 1, which may be the cam shaft above referred 3, spring fingers 16 which extend up to the 11.

nut and press against the flattened faces thereof so as to prevent rotation.

Fig. 6 illustrates one mode of applying the principles of the invention in cases where a positive adjustment in two directions may be desirable or necessary. In this figure the parts are shown as similar except that there are two tubular extensions 3?) and 3c and the flexible element will have a threaded stud 8a at each end with the sleeve 9 fixed to its mid portion. Adjustment may then be made by loosening one nut 14a and taking up on the other.

While a cable has been shown as the-preferred flexible element for the adjusting device, it is obvious that any other flexible ele ment of suflicient tensile strength and resistance to elongation could be used and such is indeed contemplated. A band of spring steel is suggested as one of the substitutes for the cable.

Now having described the invention and the preferred forms of embodiment thereof, it is to be understood that the said invention is to be limited, not to the specific details herein set forth but only by the scope of the claims which follow.

I claim:

1. In combination, a shaft having a sheave fixed thereto, a lever enclosing said sheave and rotatable with respect thereto, said lever having a lateral opening therein, a flexible element fixed to said sheave and passing around the same and having its free end adjacent said opening, a threaded stud fixed to the free end of said element, and a rotatable nut fixed in said opening and threaded on said stud whereby rotationof said nut varies the length of said element.

2. A shaft, a hub xed thereon, said hub having a plurality of annular shoulders, a lever enclosing said hub and having parts mounted for rotation about said shoulders, and means to adjust the lever relative to the hub and shaft, said means comprising a flexible element partially surrounded and secured to said hub, and mechanism to adjustably secure said flexible element to said lever.

3. A shaft, a hub fixed thereto, a lever enclosing said hub and rotatable about the axis of said shaft, a flexible member partially surrounding said hub and having one end secured thereto, means adj ustably connecting the other end of said flexible member to said lever.

LOUIS C. HUCK. 

